Help Center

Help Center

Shipping Destinations

  • We ship worldwide.

International Shipping

  • Please note that any applicable import taxes and duties are your responsibility.
  • Please make sure that your country allows the import of beef liver supplements (we are aware that certain European countries have restrictions on such products).
  • The shipment is your responsibility once it leaves our warehouse.

Shipping Times

  • We ship out new orders within 48 hours (but often on the same day) using the shipping service you chose during checkout. 
  • Shipping time varies depending on location, shipment method and other factors. Most domestic orders arrive within 2-3 business days once the order has been shipped.
  • During the holiday season, you might experience longer than usual handling and shipping times.

Shipping Fees

  • Domestic orders over $50 ship for free.
  • European orders over $100 ship for free.
  • International orders over $79.00 ship for a low flat shipping rate of $9.99.
  • The full shipping price will be displayed at checkout. 
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You can select your preferred payment method at checkout.

  • We accept secure payments for both local and international customers via credit cards, debit cards, Apple Pay and PayPal.

Note that an additional exchange fee may apply if your currency is something other than U.S. dollars.

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Your 100% satisfaction is important to us. We accept returns for a full refund or replacement on any supplements purchased within the last 30 days — even if the product has been opened. Apparel and other merchandise can only be returned if it hasn't been used and has all the tags attached.

Our return process is simple and designed for ease of use. Just follow the steps below to return your order for a full refund.

  1. Fill out this contact form.
  2. Send the product back to us using the return shipping label you receive via email.
  3. Once we receive the product, we'll issue a refund 

Damages and issues 
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items 
Unfortunately, we cannot accept returns on sale items or gift cards.

Return Address

MK Supplements
2460 Crabapple Road, Suite 202 #120
Alpharetta GA 30004

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

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The easiest way to update or cancel a subscription (recurring shipment) is to log in to the customer portal.

But before you can do that, you have to create and activate your account. If you don't have an account yet, you can create one here.

Alternatively, you can go to this URL and request a direct link to update your subscription settings.

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The best way to cancel an order is to contact us.

If your order has already shipped, don't worry! We can email you a return shipping label so you'll still receive a full refund (and we'll pay for the return shipping).

Also, you can always just shoot us a direct email at

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Please fill out this contact form if you need a replacement within 30 days of ordering. We just need to know the order, product you need replaced, and the reason why.

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International taxes might be applied to your order, depending on your country's tax policy.

Customs duty is calculated as a percentage of the customs value of the goods. The percentage or rate varies depending on the type of goods. You can check the tariff applicable in the TARIC database for the EU and the Import calculator for the USA.

The customs value is made up of:

  • the price paid for the goods
  • the insurance cost
  • the shipping cost
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Studies have shown that most plastics leach toxins (called xenoestrogens) into food, and can make you fat, sick and infertile. That’s why we decided to skip plastic containers and use glass instead. Doing so is better for the health of our consumers and better for the environment.

You can learn more about why xenoestrogens are bad for your health — as well as how to avoid them — in this article written by MK Supplements founder Michael Kummer.

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Peptides are the building blocks of proteins and help cells communicate with each other. Organ meat is a natural source of several types of these peptides, even though we don’t fully understand the exact function of all of them.

However, scientists believe that many of the benefits of consuming organ meat and organ meat supplements stem from these peptides.

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Weight loss is a byproduct of a healthy metabolism, not the result of using supplements. If you watch your carb intake, reduce your exposure to xenoestrogens and stay away from food that contains lectins (such as grains, legumes and seed oils) you will likely lose weight. 

Organ meat supplements can certainly help with that effort but they won’t be the main factor.

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That depends on your current state of health and well-being. If you’re deficient in certain micronutrients, such as Vitamin B12 or iron, you’ll likely notice an improvement in your overall health (and higher energy levels) within a few days of you start supplementing with beef organs.

If you don’t suffer from major nutritional deficiencies, you probably won’t feel a significant impact. I didn’t feel any better after starting to use these supplements because my dietary lifestyle was relatively healthy to begin with. 

However, I continue using beef organ supplements to fill any nutritional gaps I may have, since I don’t eat a huge variety of fresh organ meats (with the exception of liver, heart, kidney and bone marrow). 

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If you regularly consume enough organ meat, including liver, you’ll get all the nutrients your body requires. So there’s no need to worry about your veggie intake.

But even more important than getting the required amount of vital nutrients is getting the right nutrients. And that’s where organ meat really shines.

For example, organ meat contains heme iron and retinol (Vitamin A), whereas plants contain the inferior non-heme iron and beta-carotene (a precursor to Vitamin A). 

In both cases, the substance offered by plants is less absorbable than the substance offered by organ meat.

We're not recommending avoiding seasonal fruits and veggies (we eat them), but we remain unconvinced as to their importance in the context of human evolution.

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Gelatin is a protein (similar to collagen) and we make it by boiling bovine skin, tendons, ligaments and/or bones. 

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100% pasture-raised and grass-fed cows that don’t receive any non-organic or GMO feed are organic by definition. The reason why you still don’t see an “organic” label on our products is because the gelatin capsule isn’t certified organic. 

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We think every person who doesn’t follow a true nose-to-tail carnivore diet can benefit from beef organ supplements. 

While it’s always best to eat a variety of fresh organ meats, it’s just not feasible for most of us. Freeze-dried organ meats are the best alternative to fresh organs, and they provide micronutrients that have a higher bioavailability and absorbability than most other vitamin or mineral supplements.

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Certain organs (such as bovine liver) are rich sources of iron and fat-soluble vitamins, including vitamins A, D, E, K and B12. In high amounts, these nutrients can be toxic. That’s why we recommend sticking to the serving suggestions instead of thinking that more is always better.

For example, one serving of our grass-fed beef liver contains the same amount of micronutrients as an ounce of fresh liver. Adults can safely consume one serving per day, and we give our own kids half or less a serving.

For reference, one ounce of fresh liver (or one serving of freeze-dried liver) contains about 5,000 mcg of Vitamin A. The Mayo Clinic suggests that if you consume over 10,000 mcg on a daily basis over long periods, you might experience negative side effects including bone thinning, liver damage, headache, diarrhea, nausea, skin irritation, pain in the joints and bones, and birth defects.

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Our Grass-Fed Beef Liver supplement has an expiration date of three years from the date of manufacturing. On average the supplement you receive will have a remaining shelf-life of 2+ years.

The current lot has a "best by" date of 12/2024.

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Following a nose-to-tail diet is arguably the most Paleolithic way of eating. We make our beef organ supplements using a gentle freeze-drying method that preserves almost all of their nutrients, without adding any artificial ingredients, fillers or flow agents. So yes, our beef organ supplements are definitely paleo!
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Yes, all of our supplements are gluten-free.
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Yes, we test each batch of our supplements for heavy metals, glyphosate and other contaminants. 

Below are links to the test reports for our current stock:

If you have any questions or concerns about these reports, please don't hesitate to reach out to us!

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Liver is arguably the most nutrient-dense food on the planet and nature's ultimate multivitamin. Below is a list of vitamins and minerals you can find in grass-fed beef liver:

Betaine (Trimethylglycine)

Betaine is involved in liver function, cellular reproduction and helping make carnitine (a non-essential amino acid that the body uses to process fats and produce energy). It also helps the body metabolize homocysteine, an amino acid that can damage the lining of arteries in high levels.It also protects cells, proteins and enzymes from environmental stress (e.g., low water, high salinity or extreme temperature) and can reduce the risk of developing metabolic diseases.


Choline is responsible for brain development, memory and cognitive function. It also helps protect the heart, boosts your metabolism, and reduces your risk of pregnancy complications.


Copper helps maintain healthy bones, blood vessels, nerve cells and immune function. Together with iron, copper also enables the body to form red blood cells. It also improves iron absorption.

Iron (Heme)

Iron helps the body produce hemoglobin (a critical component of red blood cells), myoglobin (which transports oxygen into muscle tissue) and several hormones. It’s also important for bone health and immune function.


Phosphorus is important for the formation of bones and teeth; regulating the metabolism of carbohydrates and fat; and is involved in the growth, repair and maintenance of cells and tissues.


Selenium is a trace mineral that helps the body make antioxidant enzymes that play an important role in preventing cell damage and immune function. It’s also important for proper thyroid function.

Preformed Vitamin A (Retinol)

Vitamin A is a fat-soluble vitamin that exists in different versions, including retinol (preformed Vitamin A) and beta-carotene (provitamin A). The former is only found in animal sources (such as liver meat) and is much better absorbed than beta-carotene, which the body has to convert into retinol before it can be utilized.Almost 30% of the Vitamin A in bovine liver is retinol.It also plays an important role in maintaining good vision; is crucial for proper immune and reproductive function; and helps the heart, lungs, kidneys and other organs work properly.

Vitamin B12 (Cobalamin)

Cobalamin plays an important role in red blood cell formation, cell metabolism, nerve function and the production of DNA, according to the Mayo Clinic. Vitamin B12 deficiency, if left untreated, can lead to anemia, fatigue, muscle weakness, intestinal problems, nerve damage and mood disturbances. Vitamin B12 is most prevalent in animal foods, which is why Vitamin B12 deficiency is most common among those who follow a pure plant-based diet (i.e., vegans and vegetarians).

Vitamin B1 (thiamine), Vitamin B2 (riboflavin), Vitamin B3 (niacin), Vitamin B5 (pantothenic acid), Vitamin B6 (pyridoxine), Vitamin B7 (biotin) and Vitamin B9 (folate)

These B vitamins help break down proteins, fats and carbs. They also help us maintain proper energy levels by assisting in the conversion of carbohydrates into adenosine triphosphate (ATP). These B vitamins are also important for keeping the nervous system, digestive system and skin healthy, as well as for the creation of neurotransmitters.Pregnant women often get folic acid supplements prescribed to ensure proper red blood cell counts, as the body makes more blood to support the growth of the baby and to reduce the risk of birth defects.

Vitamin C

Vitamin C supports the immune system by acting as an antioxidant and fighting free radicals.

Vitamin D3

Vitamin D3 is important for the absorption of calcium and the promotion of bone growth. It also reduces inflammation and supports cellular growth, immune function and glucose metabolism.

Vitamin E (Alpha Tocopherol)

Vitamin E is an important antioxidant that protects cells from damage by free radicals.

Vitamin K2 (Menaquinone)

Vitamin K2 is crucial for the metabolism and absorption of calcium to improve bone health and density.


Zinc supports your immune system and plays a role in cell division, cell growth, wound healing and carbohydrate metabolism. 

Liver Expressed Antimicrobial Peptide (LEAP-2)

LEAP-2 is an antimicrobial peptide involved in the immune response and glucose metabolism


Hepcidin is a peptide that’s directly involved in iron metabolism and immune function.


Ergothioneine is an amino acid that is found in liver, kidney and bone marrow, and has been shown to support detoxification and longevity pathways.
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3 grams of freeze-dried liver — the standard dosage for our liver supplement — contains the same micronutrients as 1 ounce of fresh beef liver. It also has approximately 2 grams of protein (compared to about 7 grams in one ounce of fresh beef liver) and negligible amounts of fat and carbs. Note that 28 grams of raw liver contains 19.8 grams of water. That’s why our freeze-dried liver capsules have much less volume while offering similar amounts of micronutrients.

Vitamins in Liver

The numbers below are based on a serving size of only one ounce. 
  • Betaine (1.2 mg, DV not established)
  • Choline (93.3 mg, DV not established)
  • Vitamin A [Betacarotene and Retinol] (4,732 IU - 95% DV)
  • Vitamin B1 [Thiamin] (0.1 mg - 4% DV)
  • Vitamin B2 [Riboflavin] (0.8 mg - 45% DV)
  • Vitamin B3 [Niacin] (3.7 mg - 18% DV)
  • Vitamin B5 [Pantothenic Acid] (2.0 mg - 20% DV)
  • Vitamin B6 [Pyridoxine] (0.3 mg - 15% DV)
  • Vitamin B7 [Biotin] (10.27 mcg - 34% DV)
  • Vitamin B9 [Folate] (81.2 mcg - 20% DV)
  • Vitamin B12 [Methylcobalamin] (16.6 mcg - 277% DV)
  • Vitamin C (0.4 mg - 1% DV)
  • Vitamin D (4.5 IU - 1% DV)
  • Vitamin E [Alpha Tocopherol] (0.1 mg - 1% DV)
  • Vitamin K1 [Phylloquinone] and K2 [Menaquinone] (21 mcg -  18% DV)

Minerals in Liver

  • Calcium (1.4 mg - 0% DV)
  • Copper (2.7 mg - 137% DV)
  • Fluoride (11.1 mcg - 16% DV)
  • Iron (1.4 mg - 8% DV)
  • Magnesium (5.0 mg - 1% DV)
  • Manganese (0.1 mg - 4% DV)
  • Phosphorus (108 mg - 11% DV)
  • Potassium (87.6 mg - 3% DV)
  • Selenium (11.1 mcg - 16% DV)
  • Sodium (19.3 mg - 1% DV)
  • Zinc (1.1 mg - 7% DV)

Coenzymes in Liver

  • Coenzyme Q10 (1 mg, DV not established)
If you want to compare liver with traditional multivitamin supplements, please note that most nutrients in multivitamin supplements are from synthetic sources that the body can't readily absorb. As a result, your body excretes most of these synthetic nutrients via the urine. I'm sure you've noticed how your urine turns bright yellow after consuming B vitamin supplements; that's a clear indication of how your body flushes out these synthetic vitamins instead of using them. Unfortunately, you won't find any indication of bioavailability on supplement labels — all you'll see is the daily recommended value (DV), and it's easy to get tricked into thinking that a supplement that provides several times the DV of certain nutrients is better than liver (which offers lower amounts). However, all of the nutrients in liver are nature-identical whole-food vitamins and minerals that the body can readily absorb and use, instead of lab-grown versions like cyanocobalamin, a synthetic version of Vitamin B12 that is poorly absorbed.
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Yes, we firmly believe that our desiccated beef liver supplements are an excellent alternative to consuming fresh liver. That’s because the gentle freeze-drying method we use to turn 100% grass-fed and grass-finished liver into powdered gel capsules preserves almost all of the nutrients. 

One could even argue that freeze-dried liver contains more nutrients than cooked liver because certain nutrients, such as B vitamins, degrade when cooked.

We still encourage you to try and incorporate as much fresh organ meat as possible into your diet. But if that’s not in the cards, our beef liver supplements are your best option.

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Since we announced the launch of MK Supplements earlier this year, many people have asked us about the specific benefits they can expect when using desiccated (freeze-dried) beef liver.

In a nutshell, desiccated beef liver is a rich source of bioavailable micronutrients such as vitamins, minerals and coenzymes that play vital roles in your body and support brain function, metabolism, mitochondria and more. That’s why we consider beef liver nature’s ultimate multivitamin. 

So unless you make fresh organ meat a regular part of your diet, we recommend supplementing with freeze-dried beef liver capsules, regardless of how healthy you are. 

But it’s important to understand that supplementing with beef liver may have more or less noticeable effects on how you feel, depending on your current state of health and well-being. 

For example, if you’re deficient in certain micronutrients, such as Vitamin B12 or iron, you’ll likely notice an improvement in your overall health (and higher energy levels) within a few days after you start taking beef organs.

On the other hand, if you don’t suffer from major nutritional deficiencies, you probably won’t feel a significant impact. Michael and Kathy, the founders of MK Supplements, didn’t feel any better after starting to use these supplements because their dietary lifestyle was relatively healthy to begin with. 

Michael has noticed a dramatic improvement in his dental health since he started including organ meat in his diet, a fact that he attributes to his increased Vitamin K2 intake (which supports the remineralization of teeth and bones). Plus, he's noticed an improvement in his immune function, in the sense that he hasn’t been sick in over three years. 

In fact, when he contracted SARS-CoV-2 (the coronavirus that causes COVID-19), he only noticed slightly decreased energy levels for a few days (i.e., no major symptoms). He chalks up that favorable outcome to his metabolic health and the daily consumption of organ meats (mostly in the form of desiccated beef liver).

In conclusion, we view the daily consumption of organ meat as the foundation of our health and well-being, because it helps us fill any nutritional gaps we may have. However, it’s vital to understand that nutrition is only one aspect of a healthy lifestyle. If you disregard sleep, exercise, environmental toxins and stress management, you might not feel or perform optimally, despite eating well and supplementing with organ meat. 

Check out this blog post for more information, but rest assured that you’ve taken the first step towards a healthier lifestyle by including organ meat in your diet!

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Beef liver contains several compounds that improve how your mitochondria (which are your cells’ power plants) convert the food you consume into energy. One of these compounds is the coenzyme Q10 (CoQ10).

CoQ10 protects mitochondria and supports the creation of adenosine triphosphate (ATP), which cells use for fuel.

To learn more about what to expect from supplementing with desiccated beef liver, check out this help article.

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Beef liver is rich in choline and CoQ10, two nutrients that are critical for brain health. 

Choline speeds up the creation and release of acetylcholine, a protein that carries signals among brain cells and is important for memory and an assortment of other brain functions.

CoQ10 has been shown to protect brain cells from oxidative damage and reduce the activity of harmful compounds that can lead to brain disease.

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Defatting a liver means removing its fat using toxic chemicals (e.g., hexane), and with that fat many of the fat-soluble vitamins. That’s why it’s important to choose beef liver supplements that contain non-defatted liver. 

Our supplements contain only non-defatted liver and thus all the same fat-soluble vitamins that are found in fresh liver. 

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Yes, you certainly can! While we encourage you to try and include as much fresh organ meat (including liver) as possible in your diet, we understand that’s not feasible for many of us. Our freeze-dried beef liver supplements are an excellent alternative to fresh liver because they contain almost all of the same nutrients.

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While several Native American cultures have followed this principle, we haven’t found any scientific evidence to back up the idea that eating a specific organ supports the health of the same organ in your body. 

However, there’s no doubt that organ meat in general is the best source of nutrients for humans.

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Certain foods, such as aged cheese and (aged) liver, contain relatively high levels of tyramine, an amino acid that can cause migraines and high blood pressure in some people. 

The issue is often exacerbated in people who are on certain antidepressants, such as monoamine oxidase inhibitors (MAOIs). Monoamine oxidase is an enzyme that breaks down excess tyramine in the body. If that process is inhibited by medication, you might end up with elevated levels of tyramine (leading to high blood pressure and migraines).

The good news is that, based on the latest scientific evidence, fresh or freeze-dried liver has relatively low levels of tyramine. Only aged liver has been shown to have high enough levels of tyramine to cause issues and interact negatively with MAOIs.

However, to be on the safe side, if you are taking MAOIs, we recommend having a discussion with a knowledgeable healthcare professional before consuming liver supplements.

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We’re convinced that everyone can benefit from supplementing with desiccated beef liver, especially if fresh organs aren’t part of your regular diet.

Specifically, if you suffer from any of the following health issues*, we highly recommend eating fresh or desiccated organ meats on a regular basis: 

  • Alzheimer’s
  • Anemia
  • Cancer
  • Diabetes
  • Diagnosed or suspected nutrient-deficiency
  • Heart disease
  • High blood pressure
  • Low energy or fatigue
  • Overweight or obesity
  • Poor dental health (prone to cavities)
  • Reduced mental or physical performance
  • Trouble concentrating
  • Weak bones or osteoporosis.

Our Grass-Fed Beef Liver capsules are the easiest and most convenient way to do that. They contain over 25 highly-absorbable and bioavailable micronutrients, with four capsules delivering the same benefits as one ounce of fresh liver. 

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